dootask/database/migrations/2022_11_17_103811_add_users_department.php

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class AddUsersDepartment extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::table('users', function (Blueprint $table) {
            if (!Schema::hasColumn('users', 'department')) {
                $table->string('department', 255)->nullable()->default('')->after('identity')->comment('所属部门');
            }
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::table('users', function (Blueprint $table) {
            $table->dropColumn("department");
        });
    }
}